CN114483262A

CN114483262A - Urea pump, and control method and control system for urea pump

Info

Publication number: CN114483262A
Application number: CN202111643374.1A
Authority: CN
Inventors: 安丽花; 刘伟达; 李俊普; 李国朋
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-13
Anticipated expiration: 2041-12-29
Also published as: CN114483262B; WO2023125819A1; US20240125262A1

Abstract

The invention relates to a urea pump, a control method and a control system of the urea pump, wherein the urea pump comprises: a liquid inlet pipeline; the inlet of the instant heating type filtering device is communicated with the urea tank through a liquid inlet pipeline and is used for filtering and heating the urea solution flowing in through the liquid inlet pipeline; the pressure building pump is arranged on the liquid inlet pipeline and is used for driving the urea solution flowing to the instant heating type filtering device through the liquid inlet pipeline; the liquid outlet pipeline is communicated with a first outlet of the instant heating type filtering device and is used for conveying the filtered and heated urea solution to the nozzle; and the liquid return pipeline is communicated with a second outlet of the instant heating type filtering device and is used for returning the urea solution in the urea pump to the urea box after the machine is stopped. The urea pump provided by the invention has the advantages that the atomization effect of the urea solution is better, the probability of crystallization of the nozzle is reduced, the urea solution is heated in the urea pump and is sprayed out immediately after being heated, the deterioration degree of the urea solution is reduced, and the conversion rate is higher.

Description

Urea pump, and control method and control system for urea pump

Technical Field

The invention relates to the technical field of vehicle tail gas treatment, in particular to a urea pump, and a control method and a control system of the urea pump.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

The urea pump is the core component of SCR (Selective Catalytic Reduction) urea injection system, can make urea carry the urea nozzle under certain pressure through the urea pump, and the accurate execution demand's injection quantity guarantees to discharge and satisfies the regulation requirement.

The main function of the existing urea pump is to provide urea with a certain pressure to a urea nozzle, the urea can be thawed successfully at low temperature, urea with higher temperature can not be provided, and the problem of crystallization is easily caused because the atomization is not good after the urea reaches the nozzle and is sprayed to an assembly. If the urea is heated prior to entering the urea pump, the urea is again prone to deterioration, resulting in low conversion efficiency and the formation of undesirable chemical components.

Disclosure of Invention

The invention aims to at least solve the problem that the atomization of normal-temperature urea injected from a nozzle to an assembly is not good and crystallization is easy to cause. The purpose is realized by the following technical scheme:

in a first aspect of the present invention, a urea pump is provided, including: a liquid inlet pipeline; the inlet of the instant heating type filtering device is communicated with the urea tank through the liquid inlet pipeline and is used for filtering and heating the urea solution flowing in through the liquid inlet pipeline; the pressure building pump is arranged on the liquid inlet pipeline and is used for driving the urea solution flowing to the instant heating type filtering device through the liquid inlet pipeline; the liquid outlet pipeline is communicated with a first outlet of the instant heating type filtering device and is used for conveying the filtered and heated urea solution to the nozzle; and the liquid return pipeline is communicated with a second outlet of the instant heating type filtering device and is used for returning the urea solution in the urea pump to the urea box after the instant heating type filtering device is shut down.

According to the urea pump provided by the invention, after the external urea solution flows into the urea pump, the urea solution can be filtered through the instant heating type filtering device, and is heated to the first preset temperature, so that the urea solution has higher temperature and is immediately sprayed out through the liquid outlet pipeline and the nozzle, and therefore, the urea solution is sprayed out from the nozzle in a higher temperature state, the atomization effect of the urea solution is improved, and the probability of crystallization of the urea solution is reduced. It should be further noted that the urea solution is heated by the instant heating type filtering device and then immediately sprayed out from the nozzle, the retention time of the urea solution with higher temperature in the urea pump is very short, the deterioration degree of the urea solution is reduced, the generation of unnecessary chemical components is reduced, and the higher conversion rate of the urea solution sprayed out from the nozzle is ensured.

In addition, the urea pump according to the present invention may also have the following additional technical features:

in some embodiments of the present invention, the tankless filtration device comprises: the device comprises a shell, a first fixing piece and a second fixing piece, wherein a cavity is arranged in the shell; a filter element filling the cavity for filtering the urea solution flowing through the cavity; the electric heating element is arranged in the cavity and used for heating the urea solution flowing into the cavity; the liquid inlet pipeline, the liquid return pipeline and the liquid outlet pipeline are communicated with the cavity.

In some embodiments of the invention, the liquid return pipeline comprises a main pipeline and a first branch and a second branch which are connected in parallel on the main pipeline; the urea pump further includes: the overflow valve is arranged on the first branch; the back-pumping pump is arranged on the second branch; and the pressure sensor is arranged on the liquid outlet pipeline.

In a second aspect of the present invention, a control method for a urea pump is provided, for controlling the operation of the urea pump in the first aspect, the control method including:

acquiring an initial temperature of the urea pump; controlling the pressure building pump to build pressure based on the initial temperature being greater than a first threshold; acquiring an injection request and an injection demand; and controlling the instant heating type filtering device to operate for a first time period and heat to a first preset temperature according to the injection request and the injection demand.

According to the control method of the urea pump, the instant heating type filtering device is controlled to operate for the first time period and be heated to the first preset temperature according to the injection demand, so that the instant heating type filtering device can heat the urea solution flowing through the instant heating type filtering device to the first preset temperature, the urea solution is sprayed out from the nozzle in the state of higher temperature, the atomization effect of the urea solution is improved, and the probability of crystallization of the urea solution is reduced.

In some embodiments of the present invention, before controlling the pressure build-up pump to build pressure based on the initial temperature being greater than a first threshold, further comprises: controlling the instant heating type filtering device to operate and heat to a second preset temperature based on the initial temperature being less than or equal to the first threshold; the second preset temperature is greater than the first threshold.

In some embodiments of the present invention, the first predetermined temperature is in a range of 80 ℃ to 150 ℃.

In some embodiments of the invention, the first threshold is a freezing temperature of the urea solution, and the first threshold ranges from-6 ℃ to-8 ℃.

In some embodiments of the invention, the injection demand is proportional to the first period of time.

In a third aspect of the present invention, a control system for a urea pump is provided to implement the control method in the second aspect, where the control system for a urea pump includes:

the first acquisition unit is used for acquiring the initial temperature of the urea pump; a second acquisition unit configured to acquire an injection request and an injection demand; and the control unit is used for controlling the pressure build-up pump to build pressure based on the initial temperature being greater than a first threshold value, and is also used for controlling the instant heating type filtering device to operate for a first time period and heat to a first preset temperature according to the injection request and the injection demand.

According to the control system of the urea pump, the control unit controls the pressure build-up pump to build pressure based on the condition that the initial temperature is higher than the first threshold value so as to prevent the urea pump from being blocked due to icing when the urea solution flows into the urea pump, and the control unit also controls the operation of the instant heating type filtering device for a first time period and heats the instant heating type filtering device to a first preset temperature according to the injection request and the injection demand, so that the urea solution is sprayed out from the nozzle in a state of the first preset temperature, the urea solution is sprayed out from the nozzle in a state of higher temperature, the atomization effect of the urea solution is improved, and the probability of crystallization of the urea solution is reduced.

In some embodiments of the present invention, the control unit is further configured to control the tankless filter device to operate and heat to a second preset temperature based on the initial temperature being less than or equal to the first threshold value; the second preset temperature is greater than the first threshold.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 schematically shows a schematic representation of a urea pump according to an embodiment of the invention;

FIG. 2 schematically illustrates a schematic structural diagram of a tankless filtration assembly, according to an embodiment of the present invention;

FIG. 3 schematically shows a flow chart of a method of controlling a urea pump according to an embodiment of the invention;

fig. 4 schematically shows a schematic view of a control system of a urea pump according to an embodiment of the invention.

The reference numbers are as follows:

the system comprises a liquid inlet pipeline 10, a pressure building pump 11, a liquid return pipeline 20, a main pipeline 21, a first branch 22, a relief valve 221, a second branch 23, a 231 suction pump, a liquid outlet pipeline 30, a pressure sensor 31, a instant heating type filtering device 40, a shell 41, a 42 filtering piece, an electric heating piece 43, a cavity 44, an inlet 45, a first outlet 46, a second outlet 47, a control unit 100, a first acquisition unit 101, a second acquisition unit 102, a nozzle 200 and a urea box 300.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 and 2, according to an embodiment of the present invention, there is provided a urea pump including: the system comprises a liquid inlet pipeline 10, a liquid return pipeline 20, a liquid outlet pipeline 30, a pressure building pump 11 and an instant heating type filtering device 40, wherein one end of the liquid inlet pipeline 10 is communicated with a urea box 300, and the other end of the liquid inlet pipeline 10 is communicated with an inlet 45 of the instant heating type filtering device 40. One end of the liquid return line 20 is communicated with the urea tank 300, and the other end of the liquid return line 20 is communicated with the second outlet 47 of the instant heating type filtering device 40. One end of the outlet 30 is connected to the first outlet 46 of the instantaneous filter device 40, and the other end of the outlet 30 is provided with a nozzle 200. The pressure build-up pump 11 is arranged on the liquid inlet pipeline 10, and the pressure build-up pump 11 is used for driving the urea solution in the urea tank 300 to flow into the urea pump through the liquid inlet pipeline 10, and enabling the urea solution to flow through the instant heating type filtering device 40 at a certain pressure and then to be sprayed out through the nozzle 200 on the liquid outlet pipeline 30. The liquid return pipeline 20 is used for returning the urea solution in the urea pump to the urea tank 300 through the liquid return pipeline 20 after the engine is stopped, so that the urea solution is prevented from remaining in the urea pump, and the urea pump is prevented from being blocked due to crystallization or the urea solution is frozen in a low-temperature state. Specifically, the instant heating type filtering device 40 is configured to filter the urea solution flowing through the instant heating type filtering device and heat the urea solution to a first preset temperature, so that the urea solution is sprayed out through the nozzle 200 in a state of the first preset temperature, and thus the urea solution is sprayed out from the nozzle 200 in a state of a higher temperature, thereby improving an atomization effect of the urea solution and reducing a probability of crystallization of the urea solution. It should be noted that the urea solution is heated by the instant heating type filtering device 40 and then immediately sprayed out from the nozzle 200, the retention time of the urea solution with higher temperature in the urea pump is short, the deterioration degree of the urea solution is reduced, the generation of unnecessary chemical components is reduced, and the higher conversion rate of the urea solution sprayed out from the nozzle 200 is ensured. The first preset temperature may be set according to actual requirements, for example, in an exemplary embodiment, the range of the first preset temperature is set to 80 ℃ to 150 ℃. Compared with the urea solution in the normal temperature state, the urea solution sprayed from the nozzle 200 at the temperature of 80-150 ℃ has better atomization effect, is not easy to crystallize on the nozzle 200, and has higher conversion rate. It should be emphasized that the urea pump provided by the present invention does not need to change the overall design structure of the urea pump injection system, and the urea pump in the urea pump injection system of the existing vehicle can be replaced, so that the urea pump provided by the present invention has a wider application range.

In this embodiment, the instant heating type filtering apparatus includes: the filter comprises a shell 41, a filter element 42 and an electric heating element 43, wherein a cavity 44 is formed in the shell 41 in a hollow mode, and the liquid inlet pipeline 10, the liquid return pipeline 20 and the liquid outlet pipeline 30 are all communicated with the cavity 44. The urea solution in the urea tank 300 flows into the cavity 44 through the liquid inlet pipe 10 and is sprayed out through the liquid outlet pipe 30. Return line 20 is used to draw off the urea solution in cavity 44 and in inlet and

outlet lines

10 and 30 and back to urea tank 300 after engine shut-down. The electric heating element 43 is disposed in the cavity 44, the filtering element 42 fills the remaining space of the cavity 44 except the electric heating element 43, and the filtering element 42 can filter impurities in the urea solution flowing through the cavity 44 to prevent the urea solution from containing impurities, which may cause crystallization and cause clogging of the nozzle 200. The filter element 42 may in particular be made of an industrial filter paper material for filtering the urea solution. The electric heating element 43 is used for heating the urea solution flowing into the cavity 44, so that the urea solution is heated and then is sprayed out from the liquid outlet pipe 30. In this embodiment, the electric heating element 43 comprises an instantaneous electric heater to facilitate rapid heating of the urea solution flowing through the cavity 44.

In an exemplary embodiment, as shown in fig. 2, the electric heating element 43 is disposed at the middle position of the cavity 44, and the filter elements 42 are filled in the cavities 44 at both sides of the electric heating element 43, so that the urea solution flowing through the cavities 44 is more fully contacted with the electric heating element 43, and the heat exchange efficiency between the urea solution and the electric heating element 43 is improved.

In some embodiments of the invention, the urea pump further comprises: relief valve 221, pumpback 231, pressure sensor 31, stop valve and check valve, and liquid return pipeline 20 includes main pipeline 21 and first branch 22 and second branch 23 connected in parallel to main pipeline 21. The relief valve 221 is provided in the first branch passage 22, the suction pump 231 is provided in the second branch passage 23, and the pressure sensor 31 is provided in the liquid outlet passage 30. The pressure sensor 31 detects the liquid pressure in the liquid line 30. After the engine stops running, the suction pump 231 is used for emptying the urea solution in the pipeline through the suction pump 231, and the urea solution in the pipeline is sucked back to the urea tank 300. The overflow valve 221 is used for controlling the pressure in the liquid outlet pipeline 30, and when the pressure build-up pump 11 has an excessive pressure build-up, the urea solution in the pipeline can overflow through the overflow valve 221 and flow back to the urea pump, so that the pressure in the liquid inlet pipeline 10, the liquid outlet pipeline 30 and the cavity 44 is reduced, and the pressure is kept in a reasonable range. The stop valve and the check valve are used for preventing the urea solution from flowing reversely to cause the pressure imbalance of the urea solution in the liquid outlet pipeline 30, so that the pressure building pump 11 can build pressure normally.

In a second aspect of the present invention, a control method for a urea pump is provided, for controlling the operation of the urea pump in the first aspect, as shown in fig. 3, the control method includes the following steps:

step S101: acquiring the initial temperature of a urea pump;

step S102: judging whether the initial temperature is greater than a first threshold value, if so, executing a step S104, otherwise, executing a step S103:

step S103: controlling the instant heating type filtering device to operate and heat to a second preset temperature;

step S104: controlling the pressure building pump to build pressure;

step S105: judging whether to acquire an injection quantity request and an injection demand, if so, executing a step S106, and if not, finishing;

step S106: and controlling the instant heating type filtering device to operate for a first time period and heat to a first preset temperature according to the injection request and the injection demand.

In this embodiment, the initial temperature of the urea pump is the temperature before the urea pump is started, the first threshold is the freezing point temperature of the urea solution, and when the temperature of the urea pump is the first threshold, there may be a risk of freezing when the urea solution flows into the urea pump. The freezing point of the current vehicle urea solution is-11 ℃, and in order to ensure that a urea pump cannot be blocked due to the freezing of the urea solution, the first threshold value in the invention is obtained within the range of-6 ℃ to-8 ℃. Therefore, in step S102, if the initial temperature is greater than the first threshold, it indicates that the urea solution does not freeze in the urea pump, and if the initial temperature is less than or equal to the first threshold, it indicates that there is a risk of the urea solution freezing in the urea pump. In step S103, when the initial temperature is less than or equal to the first threshold, it indicates that there is a risk of freezing when the urea solution flows into the urea pump, so that the instantaneous-heating-type filtering device is controlled to operate and heat to a second preset temperature, so as to raise the temperature of the urea pump, where the second preset temperature is higher than the first threshold, so as to avoid the urea solution from freezing when flowing into the urea pump, which may cause the urea pump to be blocked. In step 104, after the temperature of the urea pump is determined to be higher than the first threshold, the pressure build-up pump is controlled to build pressure, so that the urea solution in the urea tank has proper pressure when flowing into the liquid inlet pipeline, the instant heating type filtering device and the liquid outlet pipeline, and therefore the urea solution can be sprayed at proper pressure when the nozzle is opened, and good atomization effect is guaranteed. In steps S105 and S106, by obtaining the injection request and the injection demand, the operating time of the instantaneous filtration device is determined according to the injection demand, so as to ensure that the instantaneous filtration device can heat the urea solution flowing through the instantaneous filtration device to a first preset temperature, and the first preset temperature is set to be in a range of 80 ℃ to 150 ℃. Compared with the urea solution in the normal temperature state, the urea solution is sprayed out from the nozzle at the temperature of 80-150 ℃, so that the atomization effect of the urea solution is improved, the probability of crystallization of the urea solution is reduced, and the conversion rate is higher.

In one exemplary embodiment, the injection demand is proportional to the first period of time. The larger the injection demand is, the longer the urea solution is injected by the urea pump, so that the duration of the first time period for heating the instantaneous filter device is determined according to the injection time of the urea solution, so as to ensure that all the urea solution can be heated to the first preset temperature by the instantaneous filter device in the injection process of the urea solution. The electric heating element in the instant heating type filtering device is used for heating the urea solution flowing through the interior of the instant heating type filtering device.

In a third aspect of the present invention, a control system for a urea pump is provided to implement the control method in the second aspect, and as shown in fig. 4, the control system for a urea pump includes: the system comprises a first obtaining unit 101, a second obtaining unit 102 and a control unit 100, wherein the first obtaining unit 101 is used for obtaining an initial temperature of a urea pump, the second obtaining unit 102 is used for obtaining an injection request and an injection demand, the control unit 100 is used for controlling a pressure build-up pump to build pressure based on the fact that the initial temperature is larger than a first threshold value, and the control unit 100 is further used for controlling the instant heating type filtering device to operate for a first time period and heat to a first preset temperature according to the injection demand. The first control unit 100 is a temperature sensor, and the temperature sensor is arranged inside the urea pump so as to measure the initial temperature of the urea pump. The second obtaining unit 102 obtains a NOx value by obtaining an original displacement of the engine and calculating according to the original displacement, and then converts the NOx value into an injection demand of the urea solution. The Control unit 100 is specifically an ecu (electronic Control unit) electronic Control unit 100.

In some embodiments of the present invention, the control unit 100 is further configured to control the instantaneous-type filtering device to operate and heat to a second preset temperature based on the initial temperature being less than or equal to the first threshold, where the second preset temperature is greater than the first threshold, so as to avoid the urea solution from freezing when flowing into the urea pump, and causing the urea pump to be blocked.

The invention also provides a vehicle with a urea pump and a urea pump control system, and the vehicle is controlled by the following method:

after the whole vehicle is electrified, the ECU reads the temperature of the urea pump to obtain an initial temperature, compares the initial temperature with a first threshold value (namely, a unfreezing threshold value) to judge whether the urea pump is in a low-temperature icing state, and if the temperature of the urea pump does not reach the first threshold value, the urea pump starts the instant heating type filtering device to quickly rise to a set second preset temperature, wherein the second preset temperature is higher than the first threshold value, and then the urea pump starts to build pressure. If the temperature reaches the first threshold value, the ECU sends a pressure building instruction to the urea pump to request the urea pump to build pressure; when the urea pump receives a request injection quantity sent by the ECU, the urea pump starts the instant heating type filtering device according to the numerical value of the required injection quantity, the time (namely a first time period) of rapid heating and a first preset temperature are set according to the injection quantity, and meanwhile the urea pump normally executes an injection request.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A urea pump, comprising:

a liquid inlet pipeline;

the inlet of the instant heating type filtering device is communicated with the urea tank through the liquid inlet pipeline and is used for filtering and heating the urea solution flowing in through the liquid inlet pipeline;

the pressure building pump is arranged on the liquid inlet pipeline and is used for driving the urea solution flowing to the instant heating type filtering device through the liquid inlet pipeline;

the liquid outlet pipeline is communicated with a first outlet of the instant heating type filtering device and is used for conveying the filtered and heated urea solution to the nozzle;

and the liquid return pipeline is communicated with a second outlet of the instant heating type filtering device and is used for returning the urea solution in the urea pump to the urea box after the instant heating type filtering device is shut down.

2. The urea pump of claim 1, wherein the tankless filter arrangement comprises:

the device comprises a shell, a first fixing piece and a second fixing piece, wherein a cavity is arranged in the shell;

a filter element filling the cavity for filtering the urea solution flowing through the cavity;

the electric heating element is arranged in the cavity and used for heating the urea solution flowing into the cavity;

the liquid inlet pipeline, the liquid return pipeline and the liquid outlet pipeline are communicated with the cavity.

3. The urea pump of claim 1,

the liquid return pipeline comprises a main pipeline, a first branch and a second branch which are connected to the main pipeline in parallel;

the urea pump further includes:

the overflow valve is arranged on the first branch;

the back-pumping pump is arranged on the second branch;

and the pressure sensor is arranged on the liquid outlet pipeline.

4. A control method of a urea pump for controlling operation of a urea pump as claimed in any one of claims 1 to 3, characterized in that the control method comprises:

acquiring an initial temperature of the urea pump;

controlling the pressure building pump to build pressure based on the initial temperature being greater than a first threshold;

acquiring an injection request and an injection demand;

and controlling the instant heating type filtering device to operate for a first time period and heat to a first preset temperature according to the injection request and the injection demand.

5. The method of controlling a urea pump of claim 4, further comprising, prior to controlling the boost pump to build pressure based on the initial temperature being greater than a first threshold:

controlling the instant heating type filtering device to operate and heat to a second preset temperature based on the initial temperature being less than or equal to the first threshold;

the second preset temperature is greater than the first threshold.

6. The urea pump control method according to claim 4,

the first preset temperature is in a value range of 80-150 ℃.

7. The urea pump control method according to claim 4,

the first threshold is the freezing point temperature of the urea solution, and the value range of the first threshold is-6 ℃ to-8 ℃.

8. The urea pump control method according to claim 4,

the injection demand is proportional to the first period of time.

9. A control system of a urea pump for implementing the control method according to any one of claims 4 to 8, characterized in that the control system of the urea pump includes:

the first acquisition unit is used for acquiring the initial temperature of the urea pump;

a second acquisition unit configured to acquire an injection request and an injection demand;

and the control unit is used for controlling the pressure build-up pump to build pressure based on the initial temperature being greater than a first threshold value, and is also used for controlling the instant heating type filtering device to operate for a first time period and heat to a first preset temperature according to the injection request and the injection demand.

10. The control system of a urea pump of claim 9,

the control unit is also used for controlling the instant heating type filtering device to operate and heat to a second preset temperature based on the fact that the initial temperature is less than or equal to the first threshold value;

the second preset temperature is greater than the first threshold.